Wind speed and moisture sensitivity tests of the NRL limited area dynamical weather prediction model : an OSSE study of ERICA IOP-4
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Authors
Schulz, William J.
Subjects
Sensitivity tests
prediction model
OSSE
prediction model
OSSE
Advisors
Holt, Teddy R.
Date of Issue
1992-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
An Observing System Simulation Experiment (OSSE) is
conducted to investigate the sensitivity of the Naval Research
Laboratory (NRL) mesoscale model to atmospheric water and
surface wind speed input. The explosively deepening ERICA
IOP-4 storm which occurred off the North Carolina coast on 4
January 1989 is used as a case study. Wind speed and water
vapor output from the full physics version of the model is
shown to reasonably simulate data available from the Special
Sensor Mi crowave/ Imager . Assimilating this modeled satellite
information into the degraded version of the model shows ERICA
IOP-4 to be a dynamically driven storm.
Assimilation of simulated wind speed observations yields
the best performance for the degraded model in terms of
surface pressure deepening. The model exhibits sensitivities
to the coverage area of updated information. Two treatments
for atmospheric water are tested, showing the sensitivity of
the model to these inputs despite their secondary importance
in forecasts of storm deepening.
Type
Thesis
Description
Series/Report No
Department
Meteorology and Physical Oceanography
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
106 p.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.